Office chair



FIG. 1 is a perspective view of the office chair;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left view thereof;

FIG. 5 is a right view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

The broken lines shown in the drawings are for the purpose ofillustrating portions of the office chair that form no part of theclaimed design.

CLAIM I claim the ornamental design for an office chair, as shown anddescribed.